GB/T 41685-2022 in English
VALIDSafety thresholds of Cd、Pb、Cr、Hg、As in soil for wheat production
- Issued on:2022-10-12
- Implemented on:2023-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 41685-2022小麦安全生产的土壤镉、铅、铬、汞、砷阈值》由TC404(全国土壤质量标准化技术委员会)归口,主管部门为农业农村部。
Introduction
Interpretation of core indicators of heavy metal thresholds
| Heavy metals | pH≤5.5 | 5.5-6.5 | 6.5-7.5 | pH>7.5 |
|---|---|---|---|---|
| Cadmium | 0.23 | 0.30 | 0.36 | 0.40 |
| Lead | 90 | 140 | 175 | 190 |
Key Monitoring Implementation Specifications
When using hydride generation atomic fluorescence spectrometry to detect mercury and arsenic, the sample pre-treatment process specified in HJ491 must be strictly followed. For plots exceeding the threshold, it is recommended to implement remediation in accordance with the three-year rectification cycle action plan proposed by a third-party testing agency.
Technical Evolution Background Analysis
Compared with the previous version, this standard strengthens the pH sensitive gradient design, and the mercury threshold setting adopts the mobile state + full amount indicator dual verification mode, which effectively eliminates the detection errors of special soil types such as sugar porcelain clay.

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